From this point to Zulfikar the Hari Rud is itself the boundary.
That one is afforded by the narrow valley of the Hari Rud to the west of Herat.
It is the startling contrast of the Herati oasis with the vast expanse of comparative sterility that encloses it which has given such a fictitious value to the estimates of the material wealth of the valley of the Hari Rud.
Between the Hari Rud (the river of Herat) and the Oxus, in which is almost entirely artificial in its construction.
After the Hindu Kush and the Turkestan mountains, that range which divides Ningrahar (or the valley of Jalalabad) from Kurram and the Afridi Tirah, and is called Safed Koh (also the name of the range south of the Hari Rud), is the most important, as it is the most impressive, in Afghanistan.
The Kabul river drains Northern Afghanistan, the Hari Rud the province of Herat, and the Oxus that of Afghan Turkestan.
Zulfikar, where the boundary leaves the Hari Rud, is about 70 m.
The culminating peaks of the Koh-i-Baba overlooking the sources of the Hari Rud, the Helmund, the Kunduz and the Kabul very nearly reach 17,000 ft.
Since the time of Sankara, or for more than a thousand years, the gods Vishnu and Siva, or Hari and Hara as they are also.
The geographical divisions of the country are created by the basins of its chief rivers, the Kabul, the Helmund, the Hari Rud and the Oxus.